3. Take economic parameters into account

As input data may correspond to several periods, it will be necessary to update costs over the same year, using a conversion corresponding to inflation for example.

In addition, as the data may also relate to projects involving different foreign currencies, it will be necessary to take currency conversion into account.

• The france-inflation.com website can be used to calculate inflation.

• The TauxDeChange-Euro website can be used to calculate exchange rates.